Why does the computer screen appear with water ripples and even crash when the weather is hot?

The first thing to do is to carefully check whether there are sources of electromagnetic interference around the computer, then replace a graphics card, or connect the monitor to another computer, confirm that there is no problem with the graphics card itself, and then adjust the refresh. frequency. If the above reasons are eliminated, it is likely to be a quality problem with the LCD monitor, such as poor thermal stability. The occurrence of water ripples is a common quality problem in LCD monitors. It cannot be solved by yourself. It is recommended to replace or send it for repair as soon as possible.

Some LCD monitors will have a blurry screen problem when starting up. It feels like there is high-frequency electromagnetic interference. The writing on the screen is very blurry and jagged. This phenomenon is generally due to the fact that there is no digital interface on the graphics card, but it is connected to the VGA interface of the graphics card through an internal digital/analog conversion circuit. Although this form of connection solves the problem of signal matching, it also brings about the problem of being susceptible to interference and distortion. The reason is mainly because the clock frequency of the LCD itself is difficult to maintain 100% synchronization with the clock frequency of the input analog signal. Especially when the frequency of the analog synchronization signal is constantly changing, if the synchronization circuit of the LCD display or the If the transmission line connected to the graphics card synchronization signal has problems such as short circuit or poor contact, and cannot be adjusted and followed up in time to maintain the necessary synchronization relationship, the problem of blurred screen will occur.

In a sense, the phenomenon of water ripples on LCD monitors is very common; it’s just that most products have very slight effects and cannot be noticed by users

That’s all. If the user can feel water ripples, you may wish to check it according to the following steps:

1 The signal connection line is in poor contact. This problem is the most common and can be solved by reconnecting the signal line.

2 The output signal of the graphics card is unstable. This problem is mostly seen in analog signals. If the monitor has a DVI interface, it is recommended that the user use a DVI signal cable to connect the monitor;

3 There is a problem with the monitor itself, the LCD Poor control during the production process of the Panel and defects in the monitor's software program (firmware) may cause water ripple problems. If the problem is with the monitor itself, the user has no way to solve it on his own and can contact the dealer for a replacement or return.